In my experience there's a huge difference in ability between ex-caged and ex-barn hens. Ex-caged girls do tend to weaker and just stand about before they cotton on that they can move around. Ex-barn dancers are much fitter and will jump high.

We rehomed 4 barn dancers last Sunday and only Sassasfras Roots has not tried leaping around like an acrobat!

Took my ex caged girls ages to move around. They didn't even know that they could stretch their wings. Now though they can run, jump, escape from their run. One even got out of my garden and into next doors front garden. Still don't know how